Blowing-engine.



No; 708,7l6. Patented Sept. 9, I902;

' W.. KENNEDY.

BLQWING ENGINE.

(Application filed July 2, 1900.)

(No Model.) 4 Sheais8heet I,

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(No Modl.)

W. KENNEDY.

BLOWING ENGINE.

(Application filed ul 2,' 1960.;

Patented Sept; 9, 1902 4 Sheets-She't 2.

WlTNESSES-.

, Patented Sept. 9, I902. W. KENNEDY.

BLOWING ENGINE.

[Application filed July 2, 1900,)

4 Sheets$heei 3.

{No Model.)

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No. 708,7I6. Patented Sept. 9, I902.

- w. KENNEDY.

BLOWING ENGINE.

(Application filed July 2, 1900.

4 Sheets-Sheet 4.

{NuModelJ UNITED STATES PATENT OFFICE.

WALTER KENNEDY, OF PITTSBURG, PENNSYLVANIA.

BLOWING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 708,716, datedSeptember 9, 1902.

Application filed July 2, 1900. Serial No. 22,266. (No model.)

To all whom it may concern:

Be it known that I, WALTER KENNEDY, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Blowing-Engines, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings,forming part of this specification, in which Figure 1 is'a verticalsectional view of my improved blowing-engine. Fig. 2 is a frontelevation of the same. Fig. 3 is a top plan view. Fig. 4 is a sideelevation. Fig. 5 is an enlarged irregular section of one of the valvemotor-cylinders with the control-valve therefor. Fig. 6 is a horizontalsection of the said motive cylinder with its control-valve in top planview. Fig. 7 is a cross-section on the line VII VII of Fig 5; and Figs.8 and 9 are detail sectional views of the valve and cylinder-cushion,respectively.

My invention relates to the class of blowing-engines havingpuppet-valves, and is designed to overcome the disadvantages heretoforeexperienced in this type of blowingengine and produce a simple, cheap,and economical engine for the purpose.

The main feature of my invention lies in connecting such a puppet-valvewith the movable member of a cylinder which is arranged to prevent thesudden and violent seating of the valve and, further, to use suchcylinder as a motive cylinder for the positive opening and closing ofthese valves. I

The invention further consists in the peculiar arrangement andconstruction of these Valve motive cylinders and connected parts, ashereinafter more fully described and set forth in the claims.

In the drawings, 2 represents the cylinder of a vertical blowing-engine,having piston 3 and piston-rod 4. The heads of the cylinder are providedwith oppositely located outwardly-seating inlet-valves 5 5 and withcorrespondingly inwardly-seating outlet-valves 6 6. The inlet-valvesopen to the outer air,

while the outlet-valves open into the pipes j be operated by anysuitable connections from 7 7, leading to the wind-box. The stem of eachpuppet-valve is connected to the piston 8 of a motive cylinder 9. Thesemotive cylinders are all similarlyconstructed and are shown in Figs. 5,6, 7, 8, and 9. Each cylinder is provided near each end with aninletport 10 and an outlet-port 11. Each inletport is controlled by anoutwardly-seating valve 12 and each outlet-port by an inwardlyseatingvalve 13. These valves 12 and 13 are normally pressed to their seats bysprings 14 and control the fluid flow. The chambers 15, with which theinlet-ports 10 communicate at each end of the cylinder, are connected bypipes 16 to the end portions of a valve-chamber 17, containing a hollowbalanced valve 18. I provide the cylinder 9 with a suitabledrainage-pipe 9, which communicates with the exhaust-pipe 17 at thelower end of the valve 17. Any condensation in the cylinder 9 which mayform while the parts are at rest is readily removed. The intermediateportion of this valve 18 is reduced in diameter to form a space forfluidsupply entering from pipe 19, while its end portions are enlargedto form valve portions 20, which are provided with suitable packings. Atits upper end the valve is provided with separated arms 21, connected toa plunger 22, which moves through a stuffing-box in the end of thevalve-chamber and is pivotally connected with tappet-rod 23, havingadjustable tappets 24, acted upon by a tappet carried upon a lever 25.

The outlet-ports 11 are near the ends of the cylinder 9,and from each ofthem an inclined passage 26 leads to the end of the cylinder and isprovided with several small holes 27, controlled by screw-plugs 28, bywhich the cushioning action of the motive fluid at the end of the strokemay be regulated.

The valve motive cylinders are supported upon suitable tripod standards29, and the inlet-valves are provided with stems 30, preferably three innumber, which extend through guides 31 and are provided with springs 32,

which are compressed as the valves are alternately opened. Springs 33are also provided between the outlet-valves and the outer head 34, whichsprings are compressed when these valves are opened.

The levers which operate the valves 17 may the moving parts of theengine, and I have shown in Figs. 2 and 4 one such system. In thissystem the engine cross-head 35 is provided with rollers 36, whichoperate upon the end portions of double-arm rockers 37, havinglinkconnections 38, operating rock-shafts 39, connected to the variouslevers, as shown.

The inlet-pipe 19 is preferably provided with a regulating-valve 4:5, asshown in Fig. 5, by which the inlet-pressure may be adjusted as desired.

In operating my improved engine the tappet-rod connections are arrangedso that at either end of the stroke as the piston begins to move theinlet-valve at this end will open and move inwardly by reason of thesteam admitted to its motive cylinder, it remaining in contact with theface of the piston until the limit of the motion of the valve isreached, and to cushion these inlet-valves on the piston I preferablyprovide this piston with rubber buffers 44. The outlet-valve at this endof the cylinder closes at or about the time the inlet opens and theinlet-valve at the other end of the cylinder closes. At the same timesteam is admitted to the motive cylinder of the outlet-valve in theopposite head of the blowing-engine cylinder, the pressure on thismotive cylinder being such that the outletvalve will not open againstthe pressure in the wind-box until the air in the cylinder has beenconsiderably compressed by the movement of the piston. Thus as thepressure varies in the Wind-box the outlet-valve will always open at acertain pressure below such wind-box pressure. For example, if theoutlet-valve be set so that it commences to open atthree-pounds pressurein the cylinder when the wind-box pressure is four pounds it will beginto open at nine-pounds pressure when the wind-box pressure is ten poundsand at nineteen-pounds pressure when the wind-box pressure is twentypounds. This is an important advantage flowing from the use of themotive cylinders on the puppet-valves. As the piston starts upon itsreturn stroke the inlet and outlet valves operate in the same manner andorder as that just described. By this arrangement the pistons of thesmall motive cylinders may travel rapidlyin either direction until thepiston has passed the outlet-port, when the air remaining in thecylinder will be compressed and cushion the puppetvalve to prevent itsseating violently, and by adjusting the regulating-valves at the ends ofthese cylinders the operator can control the speed of travel of thepuppet-valves during their seating. The reciprocating movements of thehollow valves for the small motive cylinders will give them themovements just described, except with the outlet-valve, which is beingopened, it opening when the pressure in the blowing-cylinder added tothe pressure exerted in the small motive cylinder will equal theWind-box pressure, when it will open quickly. In this way theWiredrawing of the air due to the pressure of the springs in the formerconstructions will be eliminated, as the steam-pressure will hold thevalve wide open. The pressure on the small motive pistons may becontrolled by a regulating-valve to be adjusted by the operator, and thepres sure in the negative end of these small cylinders may be adjustedby springs controlling their check-valves.

The advantages of my invention will be appreciated by those skilled inthe art. The use of cylinders connected to the puppetvalves prevents theviolent seatings of these valves whether these cylinders are used merelyas motive cylinders or dash-pots in connection with heavy springs on thevalves, and I intend to cover the same broadly. The use of thesecylinders as motive cylinders is of special advantage, as it enables thevalve to be moved positivelyand to be regulated as desired and preventsthe wiredrawing of the air. The system is simple and eflective and maybe applied to existing engines by replacing their heads.

Many variations may be made in the form and arrangement of thevalve-cylinders and their operating mechanism within the scope of myinvention as defined in the claims.

I claim 1. A blowing-engine having a piston reciprocated by externalpower connections, the head of the cylinder having inlet and outletpuppet-valves, motive cylinders having their pistons connected with saidpuppet-valves, and a source of fluid-pressure connected to thevalve-cylinders and arranged to actuate the piston in both directions,said source of pressure being separate from the engine-cylinder;substantially as described.

2. A blowing-engine having its piston connected to an external source ofpower, the engine-cylinder having a puppet-valve, a double-acting motivecylinder having its piston connected to said valve, a source offluid-pressure separate from the cylinder of the engine connected to themotive cylinder, and arranged to actuate the piston in both directions,and means for automatically applying the fluid to and exhausting it fromthe motive cylinder; substantially as described.

3. A blowing-engine having its piston connected to an external source ofpower, the engine-cylinder havinga puppet-valve, a double-acting motivecylinder connected thereto, a source of fluid-pressure separate from theengine-cylinder connected to said motive cylinder and arranged toactuate its piston in both directions, and a valve controlling thesupply of fluid to the motive cylinder and connected to a moving part ofthe engine; substantially as described.

4. A blowing-engine having its piston connected to an external source ofpower, the engine-cylinder having a puppet-valve in its head, a motivecylinder, a piston therein connected to the said valve and arranged tomove the same positively in both directions, a source of fluid-supplyseparate from the engine-cylinder and connected to the motive cylinder,a valve controlling said supply to and its exhaust from both ends of thecylinder, and a connection between said valve and a moving part of theengine; substantially as described.

5. A blowingengine having its piston connected to an external source ofpower, the engine-cylinder having inlet and outlet puppet-valves in itshead, double-acting motive.

cylinders connected to the said valves, a source of pressure separatefrom the enginecylinder connected 'to the motive cylinders, and valvescontrolling the fluid-supply to said motive cylinders and connected to amoving part of the engine; substantially-as described.

6. A blowing-engine having its piston connected to an external source ofpower, the engine-cylinder having a puppet-valve connected to a cylinderhaving a piston therein, said valve-cylinder having valve-controlledports at each end whereby the seating of the puppet-valve is cushioned,and a source of fluid-pressure separate from the engine connected to thevalve-operating cylinder; substantially as described.

7. An air-compressor having its piston connected to an external sourceof power, the engine-cylinder having a puppet-valve in its head, amotive cylinder connected to said valve and arranged to move it in onedirection, and power mechanism for moving it in the opposite direction,both the motive cylinder and the power mechanism being independent ofthe pressure in the compressorcylinder; substantially as described.

8. A blowing-engine comprising an enginecylinder, wind-box, piston,pistondriving means, an outwardly-opening puppet-valve controlling thepassage from the cylinder to the wind-box, a motor connected to saidvalve and a source of power for said motor distinct from theair-pressure in said cylinder or windbox but controlled by the movementof said piston; substantially as described.

9. A blowing-engine comprising an enginecylinder, wind-box, piston,piston -driving means, a puppet-valve in the cylinder-head, a motorconnected to the valve and arranged to move it in both directions, and asource of power distinct from the air-pressnre in the cylinder orwind-box but controlled by the movement of said piston; substantially asdescribed.

10. Ablowing-enginecomprisinganenginecylinder, windbox, piston,piston-driving means, an outwardly-opening puppet-valve the wind-box, amotor connected to said valve,

,a source of power for said motor distinct from the air-pressure in saidcylinder or wind-box but controlled by the movement of said piston and aregulator capable of adjustment during the operation of the engine, formaintaining the power applied to the motor substantially uniform;substantially as described.

11. Ablowing-enginecomprisinganenginecylinder, wind-box, piston,piston-driving means, a puppet-valve in the cylinder-head, a motorconnected to the valve and arranged to move it in both directions, asource of power for said motor distinct from the airpressure in saidcylinder or Wind-box but controlled by the movement of said piston and aregulator capable of adjustment during the operation of the engine, formaintaining the power applied to said motor substantially uniform;substantially as described.

12. Ablowing-engine comprisingan enginecylinder, wind-box, piston,pistondriving means, an outwardly-opening puppet-valve controlling thepassage from the cylinder to the wind-box, a motor connected to thevalve, a source of power distinct from the air-pressure in said cylinderor wind-box but controlled by the movement of said piston, and a devicearranged to maintain the power supplied to said motor at a pointinsufficient to open the valve against the backv pressure of the air inthe wind-box; substantially as described.

13. Ablowing-engine comprising an enginecylinder, wind-box, piston,piston -driving means, a puppet-valve in the cylinder-head, a motorconnected to the valve and arranged to move it in both directions, asource of power distinct from the air-pressure in said WALTER KENNEDY.

Witnesses H. M. CoRwIN, L. A. CoNNER, J r.

